MX2011004462A

MX2011004462A - Venous access port assembly and method of assembly.

Info

Publication number: MX2011004462A
Application number: MX2011004462A
Authority: MX
Inventors: Mark S Fisher; Shaun W Wall
Original assignee: Medical Components Inc
Priority date: 2008-10-28
Filing date: 2009-10-28
Publication date: 2011-10-11
Also published as: AU2009320117A1; CA3003238A1; CA2742178C; TW201021869A; MX339760B; EP2365838A1; US20100106094A1; AU2009320117B2; CA2742178A1; TWI520755B; WO2010062633A1; US9149620B2

Abstract

An implantable port assembly (10) having a lower housing (12) and an upper housing (14) and at least one chamber (20, 22) and a corresponding septum (16,18) associated therewith. The upper housing (14) includes a plurality of latch arms (30) depending therefrom that latch with corresponding catches (34) of the lower housing for mechanically securing the assembly together during bonding or welding. Each septum (16, 18) includes a peripheral flange (40) held in compression by and between the upper and lower housings (14,12) upon and after assembly. In a dual port assembly (10), a pair of septa (16, 18) are disposed side -by-side with overlapping flanges (54), and the upper housing (14) includes posts (52) extending through apertures (54) through the overlapping flanges (56) that extend into holes (58) in the lower housing (12).

Description

ASSEMBLY OF PORT OF VENOUS ACCESS AND METHOD OF MOUNTING Description of the invention The present invention relates to the field of medical devices and more particularly to venous access port assemblies.

The infusion ports for the infusion and / or removal of fluids from a patient are well known, secured to the proximal end of an implanted catheter. These ports are normally used for drug infusion or small amounts of blood draw, where large fluid flows are not required. Implantable venous access ports have the advantage that they can remain inside the patient for extended periods of time, allowing multiple use and decreasing the risk of associated infection. The ports are assemblies of an impenetrable needle housing with a discharge port in fluid communication with the catheter and the reservoir or chamber within the housing port, and provide a subcutaneous self-sealing compartment defining an access site for multi-needle puncture. through the tissue cover of the patient's skin, through the compartment and in the reservoir, without the need to continually search for new access sites. The compartment comprises material such as silicone elastomer that self- seals each time it is removed from a needle. Examples of such ports are described, for example, in U.S. Patent Nos. 4,704,103; 4,762,517; 4,778,452; 5,185,003; 5,213,574 and 5,637,102; and 6,113,572. Another catheter infusion port is described in United States Patent Publication 2006/0184142 published August 17, 2006.

Some ports that are in use, are known as dual ports or multiple ports. These provide two or more internal compartments and chambers, which all correspond to different lumens of catheter joined via the respective separate discharge ports or alternatively, separate passages in a single shank for communication with separate lumens of a dual or multiple lumen catheter, such as in U.S. Patent No. 5,360,407.

Typically, a port housing includes a base and cap that cooperate together to ensure that the needle penetrates the compartment within the assembly by compressing a seating flange of the compartment in a seat of the housing base. The housings of many such ports are joined (or welded) together, with the fixtures that hold the plug to the base while the binder dries (or while welding is performed), to compress the flange of the compartment to ensure the compression of the compartment flange after the manufacture is finished. One way to secure a lid to a base is described in the US Patent Publication No. 2007/0270770 published November 22, 2007 wherein the housing and base cap is mechanically self-clamping to compress the lip of the compartment while the binder cures. In this port, the horizontal rib segments are formed on the inner surface of the plug or the outer surface of the base, while the other provides grooves for the rib segments, so that the plug is snapped into the base by this fastening distribution for compressing the flange of the compartment between the plug and the base, thus eliminating the need to use joining tools during fabrication while the binder dries.

It is desired to provide a venous access port assembly that is certainly secured together in a certainly sealed manner.

Briefly, the present invention is an implantable venous access port assembly having a housing that is defined in at least one chamber or reservoir, at least one compartment associated with the chamber, and one discharge end having at least one a passage therethrough in fluid communication with at least one respective chamber for fluid flow in a corresponding lumen of a fixed catheter to a fixed discharge stem to the harbor housing assembly. The housing is a mounting that includes a base or lower housing and an upper housing or secure plug in the same close to at least one compartment. The upper housing includes at least two closing sections such as locking arms depending on the sides thereof, to close the coupling corresponding to the closing sections or clasps defined in or by the lower housing on the assembly thereof, compressing in one way a rim of at least one compartment. A mounting method of the present invention comprises the steps of mechanically holding the upper and lower housings together by the closing arms, which compresses between them a peripheral flange of each compartment.

In a preferred embodiment of a dual port assembly of the present invention, the compartments include peripheral flanges that are compressed between the upper and lower mounting housings, which flanges further include flanges projecting from the top and bottom surfaces of the flanges peripherals that are distributed in the corresponding slots in the upper and lower housings, all to secure the compartments in a sealed relationship over the openings above the chambers. Between the two compartments the flanges of each are overlapped, preferably, the upper housing includes a series of dependent posts which extend through the openings in the overlapped flanges and in the corresponding holes in the lower housing in the assembly. The closing arms, Flange compression structure and series of posts, all serve to secure the housings together in a way that compress the peripheral edges of the compartments while the binder cures or during ultrasonic welding, which eliminates the need for accessories in the assembly process, and also serves to secure the compartments in a sealed relationship with the housings during penetration and withdrawal of the needle.

The accompanying drawings, which are incorporated herein and constitute a part of this specification, illustrate the presently preferred embodiments of the invention, and, together with the general description given above and the detailed description provided below, serve to explain the characteristics of the invention. the invention. In the drawings: Figure 1 is an isometric view of the port assembly of the present invention; Figure 2 is an exploded view of the port assembly of Figure 1; Y Figures 3 and 4 are cross-sectional views taken along planes 3-3 and 4-4 of Figure 1.

Certain terminology is used herein for convenience only and should not be taken as a limitation in the present invention. The terminology includes the words mentioned specifically, the derivatives thereof and the words of similar importance. The modality illustrated below it is not desired as exhaustive or to limit the invention to the exact form described. This method is chosen and described to better explain the principle of the invention and its application and practical use and allows other experts in the art to better utilize the invention.

The venous access port assembly 10 of the figures includes a lower or upper base housing 12, a plug housing or upper part 14 and two compartments 16, 18 associated with the respective chambers or reservoirs 20, 22 distributed from side to side in the assembly 10. A discharge end 24 is considered to have a pair of passages 26, 28 wherein a pair of discharge stem conduits (not shown) will be associated in the assembly of a discharge stem at the discharge end , to establish fluid communication between the cameras 20, 22 and the respective lumens of a dual lumen catheter (not shown) fixed to the discharge stem at the discharge end 24. Each compartment 16,18 is made of self-sealing material to be penetrated by a needle and even closed and sealed after a respective needle (not shown) is removed; Such material can be silicone elastomer. The upper and lower housings 12, 14 are made of needle-impenetrable material, such as polysulfone or polypropylene. The upper housing 14 is fixed to the lower housing 12 by at least two closing sections, preferably closing arms 30, one on each side of the upper housing, each of which has a closure section 32 at a free end thereof that establishes a closure connection with a corresponding closure section or clips 34 of the lower housing in the assembly; four closing arms 30 are shown in this embodiment. Before closing, the compartments 16, 18 are seated in the seats of the compartment 36, 38 of a lower housing 12 so that the peripheral rims 40 of the compartments are compressed between the compression surfaces 42 of the upper housing 14 and compression surfaces. 44 of a lower housing 12 for establishing a peripheral seal on each chamber 20, 22 in a manner resistant to stresses caused by the penetration of needles with the compartments and the respective removal therefrom. The ultrasonic bonding or welding is preferably used to establish an airtight seal in addition to the closure distribution described recently; the closure arrangement serves to eliminate the need for accessories that hold the housings together while the binder cures or during ultrasonic welding.

It can be seen that the peripheral edges 46 are provided on the upper and lower surfaces of the peripheral ridges 40 of the respective compartments that seat in the corresponding grooves 48 of the upper housing 14 and the grooves 50 of a lower housing 12, facilitating the securing of the compartments in position. Preferably, the compartments 16, 18 include the portions straight laterals adjacent to each other and overlapping the flanges 56 along them. It can also be seen that a series of posts 52 (FIGS. 2 and 4) depend on an intermediate projection 60 of the upper housing 14 through the openings 54 in the overlapped edges 56 and in the corresponding holes 58 in an intermediate projection 62 of a housing lower 12, to additionally secure the compartments in place during bonding or welding, and subsequently during penetration and removal of the needle. Preferably, the closing arms 30 are positioned along the respective slots 64 of a lower housing 12 which thus provides a smooth continuous exterior surface for the port assembly. Furthermore, preferably the upper portions of the compartments 16, 18 protrude upwardly through the openings 66 in the upper housing 14 and beyond the upper surface 68 thereof, so that the location of the compartments can be discerned by sensation or palpation tactile of the doctor to identify the site of penetration of the needle.

It will be appreciated by those skilled in the art that changes may be made to the modalities described above without departing from the broad inventive concept thereof. It is understood, therefore, that this invention is not limited to the particular embodiments described, they are only intended to cover the modifications within the scope of the present invention as defined by the appended claims.

Claims

1. A venous access port (10) for use with a catheter to be inserted intravascularly into a patient, having a port assembly (10) having a housing, at least one compartment (16 or 18) for needle infusion, at least one chamber (20 or 22) associated with at least one compartment, and one discharge end (24) for a discharge stem to be fixed therein for connection to a proximal end of the catheter, the end of which discharge has at least one passage (26 or 28) therethrough associated with at least one chamber (20 or 22) and associated with a respective lumen of the catheter to establish fluid communication between at least one chamber and a lumen respective, characterized in that: the housing includes a lower housing body (12) and an upper housing body (14), the upper housing body (14) includes at least a pair of closure sections (32 or 34) distributed on the respective sides of the housing. same to close the respective coupling corresponding to the closing sections (34 or 32) defined in and by the lower housing body (12), to mechanically secure together the upper and lower housing bodies (14, 12) in a manner that compresses a peripheral flange (40) of at least one compartment (16 or 18).

2. The port (10) according to claim 1, wherein the assembly includes two chambers (20, 22) and the respective compartments associated therewith and the upper housing body (14) includes at least one additional closure section. (32 or 34) associated with a respective additional corresponding closure section (34 or 32) in the lower housing body (12).

3. The port (10) according to claim 2, wherein the closing sections are the closing arms (30) depending on the upper housing body (14), and the lower housing body (12) include the slits ( 64) along the lateral surfaces of the same along and inside where the closing arms of the upper housing body are distributed (14) in the assembly.

4. The port (10) according to claim 2, wherein the compartments (16, 18) are distributed from side to side, the compartments have adjacent straight side portions and include the respective flanges (56, 56) along the in an overlapping relationship, the upper housing body (14) includes a plurality of posts (52) depending thereon aligned with the openings (54) through the overlapping flanges of the compartments, and the lower housing body (12) includes a plurality of holes (58) aligned therewith to receive the respective posts (52) in the assembly, whereby the posts help anchor the compartments in position during and after assembly.

5. A method for installing a mountable port assembly (10), comprising the steps of: providing the upper and lower housings (14, 12) and at least one needle of the penetrable compartment (16 or 18), in at least one of the upper and lower housings including a plurality of closing sections (32 or 34) , and another thereof includes a plurality of corresponding closure sections (34 or 32); placing at least one compartment (16 or 18) in a seat of the respective compartment (36. 38); grouping the upper and lower housings (14, 12) together in a manner that are compressed therebetween in a peripheral flange (40) of at least one compartment (16 or 18); Y closing the closing sections (32 or 34) of one of the upper and lower housings with the corresponding closing sections (34 or 32) of the other upper and lower housings, whereby the upper and lower housings (14, 12) are mechanically clamped together during the ultrasonic bonding or welding thereof together while the peripheral flange of the compartment (40) is under compression.

6. The method according to claim 5, wherein the closing sections are the closing arms (30) depending on the body of the upper housing (14), and the body of the lower housing (12) including slits (64) along the lateral surfaces thereof along and within which the arms of the closure of the body of the upper housing (14) are placed in the assembly.